Here is a close-up of the gun and what the gunners view
would have been like. The selector switch at the back of the gun changed
the rate of fire. Notice the round item (black and orange) mounted to
the piece of wood. That's an oxygen regulator and the orange knob is
emergency off.

These were placed all over the aircraft and the
crew could plug their electrically heated suits into these to help keep
warm. Being that they didn't really have 'flight suits' back then...
think of it as a kind of electric blanket they had on and you'll get the
idea. The units had a dial on them (rheostat) to regulate the amount of
heat output and I'm guessing they had them cranked to the max most of
the time.

This section of the aircraft which is close to the rear is much larger
than the front half. As you can see, Jerry is standing without any
problem and he's about 6' tall. The other guy in the background is our
guide which was very knowledgeable.

Now we're at the rear of the plane and you're looking at two .50 caliber
machine guns that the tail gunner would use. This was really a gun
turret that could swing 90 degrees from left to right along with up and
down movement too. The tail gunners second roll was to be a lookout for
enemy aircraft as well. He would shoot from the standing position and
swing from side to side when needed.

Here is what the tail gun looks like from the outside. The long black
piece on the floor with a wire at one end is not part of the aircraft,
it's a safety mat covering the electrical wire so nobody trips on it
just in case you were wondering.

Here you can see the dorsal turret. It is operated
by an electro-hydraulic system, which powers both elevation and windage
of the two .50-caliber Browning machine guns, and has a rate of fire of
1,400-1,600 rounds per minute.

Here is the ball turret which was very small in order to reduce
drag, and was operated by the shortest man of the crew. To enter
the turret, it was moved until the guns were pointed straight
down. The gunner placed his feet in the heel rests and then
crouched down into a fetal position and then put on a safety
strap, then he closed and locked the door. The gunner sat in the
turret with his back and head against the rear wall, his hips at
the bottom, and his legs held in mid-air by two footrests on the
front wall. This positioned the gunner with his eyes roughly
level with the .50 caliber machine guns, and located to either
side of the gunner. The cocking handles were located too close
to the gunner to be operated easily, so a cable was attached to
the handle through pulleys to a handle near the front of the
turret.